Magnetization control apparatus for preventing clogging of drip irrigation system irrigator and control method thereof

Abstract

The present disclosure belongs to the technical field of agricultural high-efficiency water-saving irrigation, and relates to a magnetization control apparatus for preventing clogging of a drip irrigation system irrigator and a control method thereof. The method includes: pumping irrigation water from the water source project through the first water pump, passing through the drip irrigation head control hub, and entering the pool; pumping the irrigation water through the second water pump, flowing through the first copper valve, and entering the magnetized pipe; the irrigation water after treated by the magnetizer returning to the pool through the flow rate monitor and the first valve in turn; when water quality of the irrigation water meets water quality requirements entering the capillary pipes, turning off the second water pump and stopping the cyclic magnetization treatment; the third water pump turning on; pumping the irrigation water after the cyclic magnetization treatment from the pool through the third water pump, and filtering through the mesh filter, entering the branch pipe and the capillary pipes through the second valve again; and the irrigation water flowing from the irrigators for irrigation. The present disclosure effectively solves the clogging problem of the drip irrigation system irrigator, has the advantages of cleanliness and high-efficiency; improves crop yield and quality, has a simple operation mode, and is convenient for users to operate.

What is claimed is: 
     
       1. A drip irrigation system, having a magnetization control apparatus for preventing clogging of a drip irrigation system irrigator, the drip irrigation system comprising:
 a water source project ( 1 ), a water transmission and distribution pipe network, at least one irrigator ( 17 ), a first water pump ( 2 ), a drip irrigation head control hub ( 3 ) and the magnetization control apparatus; 
 wherein the magnetization control apparatus comprises: a pool ( 4 ), a second water pump ( 5 ), a first copper valve ( 6 ), a magnetized pipe ( 7 ), a magnetizer ( 9 ), a flow rate monitor ( 10 ), a first valve ( 11 ), a sensor ( 12 ) and an automatic control apparatus ( 13 ); 
 wherein the water transmission and distribution pipe network comprises: a third water pump ( 14 ), a mesh filter ( 15 ), a second valve ( 16 ), a speed regulating apparatus ( 18 ), at least one main pipe ( 37 ), a branch pipe ( 38 ) and at least one capillary pipe ( 39 ); 
 the water source project ( 1 ) is connected to one end of the first water pump ( 2 ) through the at least one main pipe ( 37 ), and the other end of the first water pump ( 2 ) is connected to an inlet of the drip irrigation head control hub ( 3 ) through the at least one main pipe ( 37 ); an outlet of the drip irrigation head control hub ( 3 ) is connected to an inlet of the pool ( 4 ) through the at least one main pipe ( 37 ); 
 the pool ( 4 ) is connected to one end of the second water pump ( 5 ) through the at least one main pipe ( 37 ), and the other end of the second water pump ( 5 ) is connected to one end of the first copper valve ( 6 ) through the at least one main pipe ( 37 ); the other end of the first copper valve ( 6 ) is connected to one end of the magnetized pipe ( 7 ); the other end of the magnetized pipe ( 7 ) is connected to one end of the flow rate monitor ( 10 ) through the at least one main pipe ( 37 ), the other end of the flow rate monitor ( 10 ) is connected to one end of the first valve ( 11 ) through the at least one main pipe ( 37 ), and the other end of the first valve ( 11 ) is connected to the pool ( 4 ) through the at least one main pipe ( 37 ); 
 the sensor ( 12 ) is located in the pool ( 4 ), and the automatic control apparatus ( 13 ) is connected to the sensor ( 12 ), the second water pump ( 5 ) and the third water pump ( 14 ); 
 an outlet of the pool ( 4 ) is connected to one end of the third water pump ( 14 ) through the at least one main pipe ( 37 ), and the other end of the third water pump ( 14 ) is connected to one end of the mesh filter ( 15 ) through the at least one main pipe ( 37 ); the other end of the mesh filter ( 15 ) is connected to one end of the second valve ( 16 ) through the at least one main pipe ( 37 ), the other end of the second valve ( 16 ) is connected to the branch pipe ( 38 ), and the branch pipe ( 38 ) is connected to one of the ends of the at least one capillary pipe ( 39 ); and the other end of the at least one capillary pipe ( 39 ) is connected to the speed regulating apparatus ( 18 ); 
 at least one irrigator ( 17 ) is provided on each of the at least one capillary pipes ( 39 ); 
 wherein the magnetizer ( 9 ) comprises: a pipe coil and a magnetization generating apparatus; 
 the pipe coil is wound on the magnetized pipe ( 7 ); 
 one end of the pipe coil is connected to one end of the magnetization generating apparatus, and the other end of the pipe coil is connected to the other end of the magnetization generating apparatus; and 
 the first copper valve ( 6 ) is configured to adjust flow rate changes through the at least one main pipe. 
 
     
     
       2. The magnetization control apparatus for preventing clogging of a drip irrigation system irrigator according to  claim 1 , wherein the magnetization control apparatus further comprises: a solar panel ( 8 );
 the magnetization control apparatus is connected to the solar panel ( 8 ); and 
 the solar panel ( 8 ) is configured to: provide electrical energy for the magnetization generating apparatus. 
 
     
     
       3. The magnetization control apparatus for preventing clogging of a drip irrigation system irrigator according to  claim 1 , wherein the magnetizer ( 9 ) is: a DC pulse variable frequency magnetizer;
 an input voltage of the DC pulse variable frequency magnetizer is: 220V/50 Hz, an output voltage is: 12-36V, an output current is: 1 A-6 A, an applicable temperature is: −10-55° C., an adjustable frequency range is: 0-120 kHz, and an effective distance is 50-1000 m; 
 a number of coil turns of the pipe coil is 20-60 turns, a material of the magnetized pipe ( 7 ) is: PVC pipe, and the pipe coil is wound on the magnetized pipe ( 7 ) in a flat winding approach; and 
 a pipe diameter of the PVC pipe is: 63 mm-90 mm. 
 
     
     
       4. The magnetization control apparatus for preventing clogging of a drip irrigation system irrigator according to  claim 1 , wherein the magnetization generating apparatus comprises: a microcontroller, a reset circuit, a display circuit, a Hall high-speed current detection sensor, a PWM pulse generating circuit, a pulse power amplifier circuit, a voltage regulator circuit and a DC power supply module;
 the microcontroller is connected to the reset circuit, the display circuit, the Hall high-speed current detection sensor, the PWM pulse generating circuit, and the voltage regulator circuit; 
 the pulse power amplifier circuit is connected to the PWM pulse generating circuit, the DC power supply module and the pipe coil; 
 the voltage regulator circuit is connected to the DC power supply module; 
 the Hall high-speed current detection sensor is installed on the pipe coil; 
 the PWM pulse generating circuit generates a PWM pulse signal; 
 the pulse power amplifier circuit amplifies a power of the PWM pulse signal generated by the PWM pulse generating circuit again, and the amplified pulse signal acts on the magnetized pipe ( 7 ) through the external pipe coil; 
 the display circuit is capable of displaying a frequency and a current waveform output by the magnetizer ( 9 ); 
 the DC power supply module provides energy for the pulse power amplifier circuit and the microcontroller to ensure safe operation of the devices; and 
 the voltage regulator circuit is configured to stabilize an input voltage into the magnetizer ( 9 ) and an output voltage from the magnetizer ( 9 ). 
 
     
     
       5. The magnetization control apparatus for preventing clogging of a drip irrigation system irrigator according to  claim 4 , wherein the magnetization generating apparatus further comprises: a casing, a button, a first pulse coil line interface ( 27 ), a second pulse coil line interface ( 28 ), a switch key ( 35 ) and a power line interface ( 36 );
 the button, the first pulse coil line interface ( 27 ), the second pulse coil line interface ( 28 ), the switch key ( 35 ) and the power line interface ( 36 ) are installed on the casing; 
 the power line interface ( 36 ) connects the switch key ( 35 ) with an external power supply; 
 one end of the pipe coil is connected to the pulse power amplifier circuit through the first pulse coil line interface ( 27 ), and the other end of the pipe coil is connected to the pulse power amplifier circuit through the second pulse coil line interface ( 28 ); 
 the DC power supply module is connected to the switch key ( 35 ); 
 the display circuit is a display screen ( 31 ); 
 the display screen ( 31 ) is capable of realizing touch screen setting; 
 the button is connected to the microcontroller; 
 the microcontroller uses a single-chip microcomputer as a core, processes information through a software program set in a memory, adjusts parameters with the display circuit and the button, performs high-speed arithmetic processing on the received signal, and outputs a signal processing result to the PWM pulse generating circuit; 
 the Hall high-speed current detection sensor transmits a current waveform signal back to the single-chip microcomputer of the microcontroller for processing, and displays the signal on the display screen ( 31 ) at the same time; 
 the button comprises: an upward adjustment key ( 29 ), a downward adjustment key ( 30 ), a confirmation key ( 32 ), a backspace key ( 33 ), a mode change key ( 34 ), a start key and a stop key; 
 the upward adjustment key ( 29 ) is configured to: turn up an evaluation index; and 
 the downward adjustment key ( 30 ) is configured to: turn down the evaluation index. 
 
     
     
       6. The magnetization control apparatus for preventing clogging of a drip irrigation system irrigator according to  claim 1 , wherein the speed regulating apparatus ( 18 ) comprises: a second copper valve ( 19 ), a third valve ( 20 ), a fourth valve ( 21 ), a flow meter ( 22 ) and a fifth valve ( 23 ); and
 the other ends of the several capillary pipes ( 39 ) are connected to one end of the second copper valve ( 19 ); the other end of the second copper valve ( 19 ) is connected to one end of the third valve ( 20 ) and one end of the fourth valve ( 21 ); the other end of the third valve ( 20 ) is connected to one end of the fifth valve ( 23 ), the other end of the fourth valve ( 21 ) is connected to one end of the flow meter ( 22 ), and the other end of the flow meter ( 22 ) is connected to the other end of the fifth valve ( 23 ). 
 
     
     
       7. A method for preventing clogging of a drip irrigation system irrigator using a magnetization control apparatus, comprising steps as follows:
 step one, using the drip irrigation system of  claim 1 , pumping irrigation water from the water source project ( 1 ) through the first water pump ( 2 ), first passing through the drip irrigation head control hub ( 3 ), and then entering the pool ( 4 ); 
 step two: pumping the irrigation water through the second water pump ( 5 ) again, first flowing through the first copper valve ( 6 ), and then entering the magnetized pipe ( 7 ); 
 in the magnetization control apparatus, by observing a flow rate displayed by the flow rate monitor ( 10 ), adjusting the first valve ( 11 ) so that the flow rate displayed by the flow rate monitor ( 10 ) is: 1.2-1.6 m/s; 
 step three: the irrigation water after treated by the DC pulse variable frequency magnetizer returning to the pool ( 4 ) through the flow rate monitor ( 10 ) and the first valve ( 11 ) in turn; 
 monitoring a colony count, an electrical conductivity, dissolved oxygen and a surface tension of the irrigation water by the sensor ( 12 ) in the pool ( 4 ); 
 the irrigation water being subjected to cyclic magnetization treatment by the magnetization control apparatus, and the sensor ( 12 ) feeding back monitored data to the automatic control apparatus ( 13 ), when water quality of the irrigation water meets water quality requirements entering the capillary pipes ( 39 ), the automatic control apparatus ( 13 ) turning off the second water pump ( 5 ) and stopping the cyclic magnetization treatment; 
 wherein the water quality requirements of the irrigation water after the cyclic magnetization treatment are: the colony count is less than 2×103 cfu/ml, the electrical conductivity is less than 4 ds/m, the dissolved oxygen is more than 5.0 mg/L, and a range of the surface tension is: 25-50 mN/m; 
 step four: the automatic control apparatus ( 13 ) controlling the third water pump ( 14 ) to turn on; 
 pumping the irrigation water after the cyclic magnetization treatment from the pool ( 4 ) through the third water pump ( 14 ), and further filtering through the mesh filter ( 15 ); 
 the irrigation water entering the branch pipe ( 38 ) and the capillary pipes ( 39 ) through the second valve ( 16 ) again; and 
 the irrigation water flowing from the irrigators ( 17 ) for irrigation. 
 
     
     
       8. The method for preventing clogging of a drip irrigation system irrigator according to  claim 7 , wherein an operating pressure of the drip irrigation system is 0.07-0.12 Mpa; an irrigation frequency of the drip irrigation system is 3-10 d/time;
 during operation of the drip irrigation system, flushing is performed every 50-60 hours; 
 steps for flushing are as follows: 
 S1. opening the second copper valve ( 19 ), the fourth valve ( 21 ) and the fifth valve ( 23 ), and closing the third valve ( 20 ); 
 S2. observing a flow rate in the pipe through the flow meter ( 22 ), and adjusting the second copper valve ( 19 ) so that a target flow rate displayed by the flow meter ( 22 ) is: 0.50-0.80 m/s; 
 S3, closing the fourth valve ( 21 ) and the fifth valve ( 23 ), opening the third valve ( 20 ), and flushing the capillary pipes ( 39 ) of the drip irrigation system for 5-10 minutes using the target flow rate; and 
 S4. closing the second copper valve ( 19 ), increasing the operating pressure of the drip irrigation system to 0.15-0.20 MPa, and flushing the irrigators ( 17 ) of the drip irrigation system for 2-3 minutes. 
 
     
     
       9. The method for preventing clogging of a drip irrigation system irrigator according to  claim 7 , wherein a magnetic induction intensity of the DC pulse variable frequency magnetizer is: 500-800 mT, a sweep frequency range is: 20 Hz-60 kHz, a scanning period is: 1.2-1.5 s, and a carrier frequency is: 1.0-1.2 MHz;
 a material of the pipe coil is: copper wire, and a cross-sectional area is: 0.5-1 mm2; and 
 the mesh filter ( 15 ) is a 150-mesh filter. 
 
     
     
       10. The method for preventing clogging of a drip irrigation system irrigator according to  claim 7 , wherein an anti-clogging ability evaluation parameter ACA of the irrigators ( 17 ) is not less than 0.8, and the flow rate is 0.5-3.0 L·h-1;
 the irrigators ( 17 ) are: chip irrigators; 
 the ACA is calculated according to formula (1),
     ACA=− 13.16× A 1/2/ L− 0.33× W/D+ 1.57  (1)
 
 
 wherein, A is a cross-sectional area of a flow channel of the irrigator, L is a length of the flow channel of the irrigator, W is a width of the flow channel of the irrigator, and D is a depth of the flow channel of the irrigator. 
 
     
     
       11. The magnetization control apparatus for preventing clogging of a drip irrigation system irrigator according to  claim 5 , wherein the evaluation index is colony count, electrical conductivity, sterilization rate, surface tension, dissolved oxygen, or redox potential of irrigation water.